Home / 20,515.15-30,772.73-11,743.89

Finding the Fourth Proportional to 20,515.15, 30,772.73 and 11,743.89

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Solution

The fourth proportional to 20,515.15, 30,772.73 and 11,743.89 is: 17,615.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.15 : 30,772.73 = 11,743.89 : x
  2. Step 2: Convert to fraction form
    20,515.15/30,772.73 = 11,743.89/x
  3. Step 3: Cross multiply
    20,515.15x = 30,772.73 × 11,743.89
  4. Step 4: Simplify right side
    20,515.15x = 361,391,343.54
  5. Step 5: Solve for x
    x = 361,391,343.54/20,515.15
  6. Step 6: Final answer
    x = 17,615.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.